Dam



Feb. 23, 1932.

C. V. DAVIS DAM Filed April 50, 1930 4 I NVEN'I 'OR 6 4,40%

ATTORNEYS cALvInv. :oAvIs, or ivrounrfvnnnon'nnw structure a found is shown in F ig. 2 wh A Patented F b. 23, 1 932 Tron oomrnnx; I1\T (J,, a or ew YoRK,

Yonx, Assmtosfm irwas co sm c. ,1\T.Y., A ooitroaarionor NEWYQBQK E A i a ncatidn filed April '30,

This invention relates tofa novel and improved to afoundation structure adapted for use where the foundation material contains areas which areunsuitable for supporting the load of the dam. The. invention will be'best :un-

derstood from the following-description and the annexed drawing"s ,inwhich I have shown a selected embodiment of the invention and; inwhich;

Fig. '1 is a vertical sectional view through a dam constructed according to this inven tlon.

' tion of dams thereis frequently "foundanarea or areas comprising, foundation mate rial not capable of takingthe-full loadingput upon it by the damfstructure. Such areas frequently occur at POItiOIlSiOf a site which is otherwise of excellent material for dam construction. Examples of such areas character from the high-grade rock adjacent 7 it or rock which may be broken or havelines of cleavage not capable of resisting the sliding forces put upon it by the weight of the --earthquakes or major earth movements; or a deep narrow soft material to excavate.

An example of a situation which may be designates a portion of soft material which may be found in the stream bed across which the dam is being built and which may extend downwardly for a great depth. Adjacent "this material may be found a portion B of broken rock capable of taking more load than the portionA butstill not sufiiciently which it would be uneconomical good to support the dam structure. On 0p posite sides of the poor-material A and B it 0 or slab upon which the superstructure of the dam is placed. ,With such a construction,

type of dam, and moreparticularly" fault.

, Fig.2 is a sectionon an enlarged scale, 1 rock wherever feasible,

lithic in characteriand 7 the buttresses. Extending between are furnished by rock, which is different in a faulted condition caused by gorge filled with earth or other.

i may deflect to a.

1936. Serial No;.4 4s,535.

acter of slab. 1 a v According to this invention, I v v faulty material;with an arch barrel extendmg up- 'and' down-stream: over the fault and having abutments on opposite sides of ,the

ing deck tresses 2.

terial such as A. and B may occur, provide an arch barrel 3 having abutments von jthe f sides ofv the fault,

solid rock on opposite This arch barreliis' shown as monoments oflthe arch barrel is a slabA' adjacent'thejabutments, so as to form v tying together the'opposite ends of the arch.

the foundation material beneath the .7

span ;the

In the selected embodiment, the dam. is shown as having an upstream water-be-ar- 1 supported on a plurality of but-- 7 extending down-stream, fromYthe deck. These buttresses arecarried to-solid;- but where faulty ma .pouredlintegrally with} the abutj Wh ch-i 'tied 'integrally to the haunches ofnthe' archa chordl To more effectively tie the'slab to the barreL. uitable reinforcing 5 may ployed... J

Not. nonly. does "the slabfA; act' asa chord, but it may also be used to support mia amount of the load ofithe dam, this amount" depending upon the character A and Bbeneath it.. To that of the material fend Iprovide on the slab piers .6,fpreferably disposeddirectly beneath buttresses, 2 supported by the be 1 ems arch barrel, and these piers preferably have 7 their tops disconnected. from the intrados of l: the arch but contactingther-ewithat 7.' 1Then,1 puton the archjb'a'rrel, it

when the load is j certain extent, and the defiection is resisted conditions, it may be advisable to connect the tops of-the piersto thefarch barrel; 1

These rel maybe placedtransverse partitions 8 which, with the piers. and barrel," form acel-I lular structure, of the construction,

by the piers 6. Under some piers may extend lengthwise arch barrel, and extending betweentheniand completely across the space beneath the barthus adding to: the strength i T e eee tr efi n my IQIl ill

be still further strengthened by making'the piers 6 nearest to the abutments integral with the barrel. If desired, transverse ribs 9 may .be disposed above the barrel and extend between buttresses to solid rock on either side of the faulty material. j

. In order topreventthe bnildingup of unequal pressure due to seepage of back water, the slab, piers and partitions may be pro- Vided with suitable drains 1O.

I claim 1. A masonry clam comprlsing an upstream deck supported by a plurality of buttresses extending a foundation'structure for some of said buttresses comprising an arch barrel extending 5 up- .and down-stream, with said buttresses resting on w the e: trad-0s of the'barrel; and piers disposed beneatlrthe intrados of said barrel beneath said buttresses and forming substantial continuations of said buttresses Q; A masonry dam comprising an upstream deck supported by a plurality fof' buttresses extendingdownstream from thedecln a' foundation structure for some "of said buttresses comprising 'an arch barrel extending up and down-stream, with said buttresses resting on the extrados of the barrel, piers disposed be neath the intra-dos of said barrel beneath said buttresses, anda slab 7 l n which said piers rest, said slab forminga chord connecting the Y haunchesfiofthe arch adjacent their abut ments; 1

3. A masonry dam' comprising an 'up-V stream deck supported by a. plurality of buttresses extending downstream from thedeck, atoundation structure torso-me ofsaid buti barrel extending V I upand down-stream, withsaidibuttresses tres'ses comprising an arch resting on the extrados' for,- the barrel', and

piers disposed beneath the intrados of said barrel beneath said buttresses and disconi nected from the barrel, butwith the piers next the abutments'of the barrel integral therewith.

4. Amasonry dam comprising an upstream deck supported by; a plurality of buttresses extending downstream from thedeclna foundation structure for some of said buttresses comprising an archbarrel extending upand down-stream, Wltli' said buttresses restlng on' the extrados of the barrel, piers disposed be-' neath the intrados of said'barrel beneath said buttresses and disconnected from the barrel, and partitions extending transversely, of the barrel between said piers.

5; A masonry dam comprising an upstream downstream fronrthe deck, and

extending downstream from the deck,=a foundation structure for some of said-buttresses r comprising an arch barrel extending upand down-stream, with said buttresses resting on the extrados of the barrel, piers disposed be' l'ne'ath the intradosof'said barrel beneath said buttresses and disconnected from the barrel,

and partitions extending transversely. of the barrelbetween said piers and between said buttresses above the barrel. 1

' 7; A masonry dam comprising an upstream decksupported'by a-plurality or" buttressesex-tending downstream from the deck, a foun dation structure'j-for some of said -buttresses comprising an arch barrel extending up-and down-stream, with saidbuttresses resting on the extrados ofthe barrel, piers disposed beneaththe intrados of saidbarrelbeneath saidbuttresses: and :disconnected from said barrel, slaband aslab on which said piersrest,said forming achord-conneeting the haunches of the arch adjacent their abutments 8'. A masonry dam comprlslng an upstream I deck-supported by a plurality of buttresses extending downstream from the deck, a founr elation structure for some of saidbuttresses comprisingan arch'barrel extending upand down-stream,,w1th said buttresses restingon the extrados of the barrel,and piers'disposed' beneath the 'intra'dos-of said barrel beneath sai-dbuttresses and disconnected from the barrel. i

deck supported by a plurality of buttresses extending downstream from the deck, 'a foundationfstructure for some of said buttresses comprising an arch barrel extending upand down-stream, with saidbuttresses resting-on the extrados of the barrel, piers disposed be neath the intrados of said barrel beneath said buttresses'and disconnected from the barrel, 

